Carol Johnson’s mind-boggling blunders

At-large City Councilor John Connolly, who knows more about public education than any elected official in Boston, says it’s time for Boston school Superintendent Carol Johnson to hit the bricks. He says she “needs to go’’ based on an “emerging pattern of bad decisions.’’ Is he right? Is Johnson beyond redemption? Has she committed one blunder too many?

This is a purely theoretical discussion, mind you. Johnson isn’t going anywhere. Mayor Menino isn’t about to jettison her just a few months before the deadline for a new student assignment plan and in the middle of contract negotiations with the city’s teachers’ union. Besides, she’s enormously popular with the city’s business and nonprofit leaders. And even after what is likely the worst week in a decades-long career, Johnson doesn’t sound like someone who is even vaguely contemplating retirement.